49. No proceedings under this Act shall be affected by reason of any mistake in the name of any person thereby rendered liable to pay any sum of money, or in the description of any estate or tenure or land in respect of which he is rendered liable to pay, or by reason of any other informality, provided the directions of this Act be in substance and effect complied with;and on proceedings under this Act shall be affected by reason of the omission to serve any notice on any zamindars whose name is not recorded on the Collector's registers as owner of the estate in respect of which the notice is required to be served.